Convert string to int

Question

I am having trouble converting a string to an integer. I am googled, but all I can find is how to convert int to string. Does anyone know how to do this the other way around? Thank.

Answer 1

See the reference to the NSString class .

NSString *string = @"5"; int value = [string intValue]; 

Answer 2

What about

 [@"7" intValue]; 

Alternatively, if you want NSNumber , you can do

 NSNumberFormatter *numberFormatter = [[NSNumberFormatter alloc] init]; [numberFormatter numberFromString:@"7"]; 

Answer 3

I use:

 NSInteger stringToInt(NSString *string) { return [string integerValue]; } 

And vice versa:

 NSString* intToString(NSInteger integer) { return [NSString stringWithFormat:@"%d", integer]; } 

Answer 4

Swift 3.0:

 Int("5") 

or

 let stringToConvert = "5" Int(stringToConvert) 

Answer 5

This is a simple solution to convert a string to int

 NSString *strNum = @"10"; int num = [strNum intValue]; 

but when you get the value from the text box,

 int num = [txtField.text intValue]; 

where txtField is the output of UITextField

Answer 6

I should have done something similar, but wanted to use a getter / setter for mine. In particular, I wanted to return a long one from a text box. Other answers to all worked well too, I just ended up adapting my project a bit as my school project developed.

 long ms = [self.textfield.text longLongValue]; return ms; 

Answer 7

 NSString *string = /* Assume this exists. */; int value = [string intValue]; 

Answer 8

Very simple..

int (name of integer) = [(name of string, no ()) intValue];

Answer 9

Another way: if you are working with string C, for example. const char *, C native atoi() more convenient.

Answer 10

You can also use like:

NSInteger getVal = [self.string integerValue];

Answer 11

To convert a String number to Int , you must do this:

 let stringNumber = "5" let number = Int(stringNumber)